talk/session/phone/webrtcvideocapturer.h

// libjingle
// Copyright 2004 Google Inc.
//
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#ifndef TALK_SESSION_PHONE_WEBRTCVIDEOCAPTURER_H_
#define TALK_SESSION_PHONE_WEBRTCVIDEOCAPTURER_H_

#ifdef HAVE_WEBRTC_VIDEO

#include <string>
#include <vector>

#include "talk/base/messagehandler.h"
#include "talk/session/phone/videocapturer.h"
#ifdef WEBRTC_RELATIVE_PATH
#include "modules/video_capture/main/interface/video_capture.h"
#else
#include "third_party/webrtc/files/include/video_capture.h"
#endif

namespace cricket {

// Factory to allow injection of a VCM impl into WebRtcVideoCapturer.
// DeviceInfos do not have a Release() and therefore need an explicit Destroy().
class WebRtcVcmFactoryInterface {
 public:
  virtual ~WebRtcVcmFactoryInterface() {}
  virtual webrtc::VideoCaptureModule* Create(
      int id, const WebRtc_UWord8* device) = 0;
  virtual webrtc::VideoCaptureModule::DeviceInfo* CreateDeviceInfo(int id) = 0;
  virtual void DestroyDeviceInfo(
      webrtc::VideoCaptureModule::DeviceInfo* info) = 0;
};

// WebRTC-based implementation of VideoCapturer.
class WebRtcVideoCapturer : public VideoCapturer,
                            public talk_base::MessageHandler,
                            public webrtc::VideoCaptureDataCallback {
 public:
  WebRtcVideoCapturer();
  explicit WebRtcVideoCapturer(WebRtcVcmFactoryInterface* factory);
  virtual ~WebRtcVideoCapturer();

  bool Init(const Device& device);
  bool Init(webrtc::VideoCaptureModule* module);

  // Override virtual methods of the parent class VideoCapturer.
  virtual bool GetBestCaptureFormat(const VideoFormat& desired,
                                    VideoFormat* best_format);
  virtual CaptureResult Start(const VideoFormat& capture_format);
  virtual void Stop();
  virtual bool IsRunning();

 protected:
  // Override virtual methods of the parent class VideoCapturer.
  virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs);

 private:
  // Callback for our started event.
  virtual void OnMessage(talk_base::Message* message);
  // Callback when a frame is captured by camera.
  virtual void OnIncomingCapturedFrame(const WebRtc_Word32 id,
                                       webrtc::VideoFrame& frame,
                                       webrtc::VideoCodecType type);
  virtual void OnCaptureDelayChanged(const WebRtc_Word32 id,
                                     const WebRtc_Word32 delay);

  talk_base::scoped_ptr<WebRtcVcmFactoryInterface> factory_;
  webrtc::VideoCaptureModule* module_;
  int captured_frames_;
};

struct WebRtcCapturedFrame : public CapturedFrame {
 public:
  explicit WebRtcCapturedFrame(const webrtc::VideoFrame& frame);
};

}  // namespace cricket

#endif  // HAVE_WEBRTC_VIDEO
#endif  // TALK_SESSION_PHONE_WEBRTCVIDEOCAPTURER_H_